Grinding-roll.



PATENTED APR. 28, 1908.

L. G. WALES.

GRINDING ROLL.

APPLICATION FILED SEPT. 7, 1907.

Fig"- 1 WITNEEEEE. .ZQ'N VEN TUE. 16% an 025% "av/L41) UNITED -S TATESPATENT orrioni LESTER O. WALES, OF- EDGEWOOD, RHODE ISLAND. I

GRINDING-ROL L.

Specification of Letters Patent.

Ratented ril 28,1998.

Application filed September 7, 1907'. Serial No. 391,776.-

To all whom it may concern:

Be it known that I, LESTER C. WALES, a citizen of the United States,residing at 'Edgewood, in the county of Providence and State of RhodeIsland, have invented a new and useful 1m rovement in Grinding-Rolls,

of which the fo lowing is a specification.

tachably secured on-the peripheral face of the roll and the slack of thesame (caused by the abrasive material coming into contact with the work)automatically taken up.

A further object of my invention is to sim-' plify the construction of agrinding roll, whereby a flexible sheet of abrasive material, such assand aper or emery cloth, is quickly secured on t e face of the roll orremoved from the same and the cost of manufactur-' ing the roll reduced.r X

My invention consists in the peculiar and novel construction of agrinding roll for wood working machines, said grinding roll havingdetails of construction, as will be more fully set forth hereinafter andclaimed Figure 1 is a face view of my improved grinding roll, shownpartly in section, the

sectional portion of which is taken on line 1 1 of Fig. 3. Fig. 2 is anenlarged transverse sectional view taken on line 2 2 of Fig. 1, showingthe sheet of abrasive material in position and before bein tightenedonto the peripheral face of the r0 1. Fig. 3.is an en- Fig. 2, showingthe sheet of abrasive material after bein tig tened onto the peripheralface of the re and Fig. 4 is an enlarged ,detail sectional view, showingthe means forsupportin and turning the locking ,bar.

In t e drawin s, 11 indicates a shaftfbla. hollow cylindrica roll, a acylindricalshell, d

a locking bar of 111 im roved grinding roll, and e a sheet of exib eabraslve material, such as paper or cloth covered with sand, emery orcorundum.

The shaft a is rotatably 'supported in bear vings in the machine and isrevolved at a bi h rate of speed by the driving mechanism of t e argedtransverse sectional view similar tov machine to revolve the roll in thedirection of the arrow, as shown in Fig. 3.

to have the closedends 5 5 extending out from the face of the roll toform the annular lips 6-6 at each end of the roll, the central verse J10es 8 8. formin trunnionson the ends 0' the locking bar d, thelongitudinal rib .19 formed on the inner the roll and extending theeng'th of the roll;

tion in which the rollrevolves, as

detachabl secured to the roll.

The cy' drical shell ,0 isconstructed to 'have'a rotatable fit ontheroll 6, a com arein Fig. 1. This shell 10 is held from longitudiend lips6 6 on the roll in a position for the in the roll, as shown in Fig.2. Asheetof her, is secured to the peripheralface of the shell bcement-or'other means.-

has a trunnion 15 at each end of the ba in shaped to form (inconjunction with the flat face 10 of the rib-9) aclam towedge or in fulllines in Fig. 2, and to release-the sameof the roll flushi the ends, as;shown The hollow cylindrical roll I) is constructed circumference oftheroll and having the flat radial. face 10, and a comparatively widelongitudinal slot 1-1 in the 'eripheral face of e 0 I The rib 9 formsone edge of the slot, the 5' widthof which extends in an opposite.direcshown in"). Fig. 3. One or both of the endsb '5 may be nalmovement on the roll I) by the annular felt 14 or other suitablematerial such as rubthe end of which is a square hole 16 and at curvedface 17 extending the'length of the bar on the side toward the flat face10 of the. rib 9. This curved. face 16 of the bar is 9 hubs 7 7 by whichthe roll is secured to'theshaft 11 b any well known means, thetransbearings for the I .tively narrow longitudinal slot 12 an 'l3WOholes 13 13 at each end of the shell, as shown 7 slot 12 in the shell tocoincide-with the slot 11" I p The ocking bar (1 extends the length ofthe? a roll opposite the flat face 10 oftherib Qand i 9G clam the endsof the sheet 0 abrasive materia between the rib 9 and the bar, when thebar .is turned into the position, as. shown p .1 when'the bar turnedinto the position ,as f j shown in'broken lines 2. The trun- 1" f "nions1-5 15011 the ends of t clocking bar d. extend through'the holes 81.8,theends' 5 5. 05 Fi.1. The sheet .of-abraslve material e is secg donthe peripheral surfaceof the shell 0 b serting one end ofthesheetthrongh vthe $1913 12 in the shell. theslot 11 .1 the-remandbe-.

tween the rib 9 and the locking bar (I with the locking bar (1 in theopen position, as

' able tool is now-inserted in the s uare hole 16 in the end of thetrunnion an the lockflfifi bar turned into the position, as shown inlines in Fig. 2 thereby clamping the ends of the sheet between the rib 9and thelocking bar d. A spanner having two ins is now placed on one endof the shell 0 with the pins in the holes 13 13 in the shell and theshell 0 turned on the roll I; in the direction of the arrow, as shown inFi 2, thereby drawing the doubled portion of the sheet of abrasivematerial over the locking bar (1 and tightening the sheet of abrasivematerial onto the 'peri heral face of the shell 0, as shown in Fi en inuse the roll is revolved in the direction of the arrow, as shownin Fig.3.

The frictional contact of the work on the,

sheet of abrasive material e will tend to stretch the same in anopposite direction to the direction-in which the roll is revolving,thereby moving or artly rotating the shell 0 on the roll I) in airection opposite to the direction in which the roll is revolving, and

. through this reverse movement of the shell automatically taking up theslack in the sheet of abrasive materiaL Through the wedging action ofthe locking bar d any strain 0 the sheet of abrasive material e tendingto pull the ends of the sheet out of the roll will cause thelocking barto more firmly grip and hold the ends of the same in the roll.

ing a longitudina It is evident that the rib 9 could be in the form of afixed bar, corresponding in shape to the locking bar d with its curvedface in an op ositel -disposed position and the longitu inal slbt 11 inthe roll I) could extend in width on both sides of a center line drawnbetween the bars, whereby the roll could be revolved in either directionand other details of construction could be varied without materiallyaffecting the s irit of my invention. Having thus descri ed myinvention, I claim as new and desire to secure by Letters Patent:

1. In a grindin roll, a cylindrical roll hav- Islot, a cylindrical shellrotatablysup orted on the roll and having a or 'longitudina slot, andmeans in the roll securing-theends of a sheet of abrasive material.:2... In a grinding roll, a cylindrical roll havtatably suplported on theroll and having a longitudina slot, means for holding the shell fromlongitudinal movement on the roll, and means for. securing the ends ofasheet of abrasive material in the roll.

3. In a grinding roll, a cylindrical roll havslot, a cylindrical shellro-.

holding I the shell from longitudinal movement on the roll, and meansfor securing the enflls of a sheet of abrasive material in the ro 1 5.In a grindin roll, a cylindrical roll having annular radia flanges ateach end and a lon itudinal slot in its face, a cylindrical sherotatably su ported on the roll and having a longitudina slot in itsface coinciding with the slot in the roll, and means for de tachablysecuring the ends of a sheet of abrasive material in the roll.

6. In a grinding roll, a cylindrical roll having a longitudinal slot inits face, a longitudina' rib on its inner circumference and a lookingbar adjacent the rib, a cylindrical shell rotatably sup orted on theroll and having a longitudinal s ot in its face coinciding with the slotin the roll, and means for rotating the locking bar to clamp the ends ofa sheet of abrasive material between the rib and the-- locking bar.

- 7. In a grindin roll, a cylindrical roll having annular radia flangesat each end, a comaratively wide longitudinal slot in its face, a on'tudinal rib on its inner face, and a rotatab e locking bar adjacent therib, a cylindrical shell rotatably supported on the roll and havin a comaratively narrow slot in its face an covered with a resilient material,and means for rotating the locki bar, whereby a sheet of abrasivematerial is held on the peripheral face of the shell, the ends of thesheet of abrasive material clamped between the rib and the locking barand the slack of the sheet of abrasive material automatically taken upwhen the roll is in use.

8. In a grindin roll, a cylindrical roll having annular radia flanges ateach end, a comaratively wide longitudinal slot in its face, a onitudinal rib on its inner face and a rotatab e locking bar' having acurved face adj acent the rib, acylindrical shellrotatably sup ported onthe roll and having a comparatively narrow longitudinal slot in itsface, transverse holes in each end and covered with aresilient material,Whereb a sheet of abrasive material is first loosely he d on the shell,the ends of the sheet of abrasive material secured by clam ing the samebetween the rlb and the locking bar, the initial slack of the sheet ofabrasive material taken up by partly rotating the shell on the roll andthe slack of the sheet of abrasive material caused by the same cominginto contact with the work taken up by the shell automatically moving orpartly rotating on the roll when in use.-

9. In a grinding roll the combination of a shaft 0,, a cylindrical rollI) havin the ends 5 5 secured to the shaft a, the annu ar li s 6 6 ateach end, the lon itudinal rib 9 on t e inner circumference of the rolland a comparatively wide longitudinal slot 11 in the race of the roll, acylindrical shell 0 rotatably supported on the roll I) and having a cornara-t tively narrow longitudinal slot 12 an two holes 13 13 in each endof the shell, a sheet of felt 14 on the face of the shell 0, a lockingbar d extending the length of the roll and having name to thisspecification in the presence of two subscribing Witnesses.

LESTER O. WALES.

Witnesses:

ADA E. HAGERTY,

J. A. MILLER.

a trunnion 15 in the end of which is a square 15 In testimony whereof Ihave signed my 20

